Batch Image Converter
Convert a whole folder of images to JPG, PNG, or WebP at once. Drop, pick a format, download all. Everything happens in your browser — no upload, no signup, no per-file limit.
Drop multiple images to convert at once
JPG, PNG, WebP, GIF, AVIF, BMP — never uploaded
How batch conversion works
Each image is decoded by the browser, redrawn onto a canvas at full resolution, and re-encoded into your chosen format. ToolChop processes files one at a time to keep memory predictable — dropping 100 files at once just means it takes 100× as long as one, not 100× as much memory.
Why a local batch converter matters
Batch conversion is almost always a business workflow: a marketing team converting product shots, a real-estate agent prepping listing photos, a designer flattening client mockups, a developer processing screenshots. The volume of content makes the privacy stakes higher than for single files. ToolChop keeps the entire batch local.
Which format to pick
- WebP — best balance of size and quality. 25–35% smaller than JPG at the same visual quality. Supports transparency. Universally supported in modern browsers.
- JPG — broadest compatibility. Use when targeting legacy software or very old email clients. Cannot store transparency.
- PNG — lossless. Use for screenshots, UI mockups, icons, and any image with text or sharp edges.
Frequently asked questions
How do I batch-convert many images at once for free?
Drop the whole folder (or as many files as you like) onto ToolChop. Pick the target format — JPG, PNG, or WebP. Each file converts in your browser and a Save button appears next to it; click Download All to save every converted file in one go. No account, no upload, no daily limit.
Does ToolChop upload my images?
No. Every conversion runs in your browser using Canvas + the native image decoder. None of the images leave your device. This matters more for batches than single files — uploading 50 images to a server is 50× the data exposure.
Why is the privacy story important for batch converters?
Batch conversion is usually a business workflow: a marketing team converting product shots, a real-estate agent prepping listing photos, a designer flattening client mockups, a developer processing screenshots. The volume means more sensitive content travels in one shot if uploaded. ToolChop keeps the entire batch local.
How many files can I convert at once?
There is no hard cap on file count. Browser memory is the real limit — for typical photos (1–5 MB each), batches of 50–200 work comfortably. ToolChop processes files one at a time to avoid memory spikes, so large batches just take longer; they don't crash the page.
What input formats are supported?
Anything your browser can decode: JPG, PNG, WebP, GIF (first frame), AVIF, BMP, ICO. For HEIC files specifically, use the HEIC-to-JPG converter — HEIC needs a separate WebAssembly decoder that the dedicated tool already loads.
What is the best output format for sharing on the web?
WebP — typically 25–35% smaller than JPG at the same visual quality, supports transparency like PNG, and is supported by every modern browser since 2020. Use JPG only if you specifically need broader compatibility (very old email clients, some legacy software).
Does the batch converter preserve transparency?
Yes for PNG and WebP — the alpha channel is preserved. JPG cannot store transparency, so transparent areas are flattened to white (or to the background color you pick) when converting to JPG.
What quality should I pick for JPG?
92% (the default) is visually lossless for almost every use case. Drop to 85% for smaller files when sharing — most people cannot tell the difference. 100% is wasteful since JPG compression has a hard ceiling. For tiny thumbnails, 70% is plenty.
Does the converter resize my images?
No — every output keeps its original pixel dimensions. The batch converter changes the file format, not the dimensions. To resize too, use the Image Resizer first, then bring the resized files here for format conversion.
How long does a 100-file batch take?
Roughly 30–90 seconds on a modern laptop. Each file takes 200–800 ms (most of that is decoding the source). The page processes files in sequence to keep memory predictable; large batches scroll through visibly. You can leave the tab and come back — conversion continues in the background.
What happens if one file fails?
The failed file is marked with an error icon and a short reason; the batch continues with the next file. You can remove the failed entry (× button) and re-drop a different one. ToolChop never aborts the whole batch because of one bad file.
Why use ToolChop instead of a desktop tool like ImageMagick or XnConvert?
Two reasons. First, no install — ToolChop runs in any modern browser, on any OS. Second, no upload to a third-party service, which uploaded batch converters require. ImageMagick and XnConvert are great but require local install; if you don't want to install software just to convert 30 images, this is the right tool.